121 lines
4.5 KiB
Python
121 lines
4.5 KiB
Python
from PIL import Image, ImageDraw, ImageFont
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import os
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import math
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import random
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def resize_with_crop(img, target_size):
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"""Resize an image with cropping to match the target aspect ratio."""
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width, height = img.size
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target_width, target_height = target_size
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aspect = target_width / target_height
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if width / height > aspect:
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new_width = int(height * aspect)
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left = (width - new_width) // 2
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img = img.crop((left, 0, left + new_width, height))
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else:
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new_height = int(width / aspect)
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top = (height - new_height) // 2
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img = img.crop((0, top, width, top + new_height))
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return img.resize(target_size, Image.Resampling.LANCZOS)
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def load_small_images(directory, target_size):
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"""Load and resize small images from a directory."""
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small_images = []
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for filename in os.listdir(directory):
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if filename.lower().endswith(('.png', '.jpg', '.jpeg')):
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try:
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img = Image.open(os.path.join(directory, filename))
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img = resize_with_crop(img, target_size)
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small_images.append(img)
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except Exception as e:
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print(f"无法加载图片: {filename}, 错误: {e}")
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return small_images
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def create_text_image(text, output_size, font_path=None, font_size=1800):
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"""Create a grayscale image with the target text."""
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temp_img = Image.new('L', output_size, 0)
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draw = ImageDraw.Draw(temp_img)
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font = load_font(font_path, font_size)
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bbox = draw.textbbox((0, 0), text, font=font, anchor="lt")
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text_x = (output_size[0] - (bbox[2] - bbox[0])) // 2
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text_y = (output_size[1] - (bbox[3] - bbox[1])) // 2
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draw.text((text_x, text_y), text, fill=255, font=font)
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return temp_img
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def load_font(font_path, font_size):
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"""Load a font, falling back to default if unavailable."""
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try:
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return ImageFont.truetype(font_path or "simhei.ttf", font_size)
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except:
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try:
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return ImageFont.truetype("msyh.ttc", font_size)
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except:
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print("警告: 未找到中文字体，可能无法正确显示中文")
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return ImageFont.load_default()
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def paste_small_images(small_images, rows, cols, small_img_size, temp_img, output_img):
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"""Paste small images onto the output image based on the text mask."""
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for y in range(rows):
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for x in range(cols):
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box = (
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x * small_img_size[0],
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y * small_img_size[1],
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(x + 1) * small_img_size[0],
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(y + 1) * small_img_size[1]
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)
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sample_x = box[0] + small_img_size[0] // 2
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sample_y = box[1] + small_img_size[1] // 2
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if sample_x < temp_img.width and sample_y < temp_img.height:
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small_img = random.choice(small_images)
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small_img = prepare_small_image(small_img, box, temp_img.getpixel((sample_x, sample_y)))
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output_img.paste(small_img, box, small_img if small_img.mode == "RGBA" else None)
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def prepare_small_image(small_img, box, pixel_value):
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"""Prepare a small image for pasting, applying transparency if needed."""
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small_img = small_img.resize((box[2] - box[0], box[3] - box[1]))
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if pixel_value <= 128:
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small_img = small_img.convert("RGBA")
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alpha = small_img.split()[3].point(lambda p: p * 0.6)
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small_img.putalpha(alpha)
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return small_img
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def create_character_mosaic(target_text, small_images_dir, output_path, output_size=(7680, 4320), small_img_size=(60, 60)):
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"""Main function to create a character mosaic."""
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small_images = load_small_images(small_images_dir, (100, 100))
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if not small_images:
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raise ValueError("没有找到可用的图片")
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temp_img = create_text_image(target_text, output_size)
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cols = math.ceil(output_size[0] / small_img_size[0])
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rows = math.ceil(output_size[1] / small_img_size[1])
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output_img = Image.new('RGB', (cols * small_img_size[0], rows * small_img_size[1]))
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paste_small_images(small_images, rows, cols, small_img_size, temp_img, output_img)
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output_img.save(output_path)
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print(f"图片已保存到: {output_path}")
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if __name__ == "__main__":
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target_text = "WIN"
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small_images_dir = "images"
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output_path = "youbang_poster.jpg"
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if not os.path.exists(small_images_dir):
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os.makedirs(small_images_dir)
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print(f"请将小图片放入 {small_images_dir} 目录中")
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else:
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create_character_mosaic(target_text, small_images_dir, output_path) |